Improvement in knitting-machine burrs



G. JACKSON & G. CAMPBELL.

KNITTING MACHINE BUR.

No. 39,347. Patented July 2-8, 1863.

FIG. I.

Wilhesses:

UNITED STATES PATENT OFFICE.

GEORGE JACKSON AND GEORGE CAMPBELL, ()F COHOES, NEW YORK.

IMPROVEMENT lN KNITTING-MACHINE BUPLRS.

Specification forming part of Letters Patent No. 39,317, dated July 28, 1863.

To all whom it may concern: 7

Be it known that we, Gnoacn JACKSON and GEORGE CAMPBELL, each of the village of Cohoes, in the county of Albany'aud State of New York, have jointly invented certain new and useful.Improvements in Burrs for Knitting-lllachines, of which the following embraces a full and exact description, reference being had to the annexed drawings, in which-- I Figure 1 is a half-section and half side view of a knitting-burr embodying the whole principle of our said invention, and Figs. 2 and 3 are end and side views of the slotted hub in that burr. Fig. 4 is a side view of one of the blades in the same burr, and Fig. 5 is a halfside view and half-section of a modification of our. knitting-burr having a series of such blades held in, an obliquely-slottedhub, like that shown in Fig, 6, but without the screw and nut, the ring F being in this example shown as secured to the hub by friction only. it may also be fastened to the hub by a key or pin, or other usual mechanical means. parts in all The same letters refer to like the figures.

One part of our invention-consists in mak-" ing the blades A for knitting-burrs with a tapered shank, b, Fig. 4, on one end of the blade, and with a projection, c, on ,the inner edge of the end portion of the said shank, so

that a series of the blades will be secured in the slots d, Figs. 2, 3, and 6, or asuitable hub, E, and thus form a knittingburr by means of a suitable ring, F, Figs. 1 and 5, pressed on tight arouiTd the shanks of the blades in the hub, the projeclions c on the shanks being placed against-the end 9 of the hub, substantially as indicated in Figs. 1 and 5. Consequently, by furnishing, such improved blades A, we enable the manufacturer to make knitting-burrs by simply putting our said blades in the slots (1 of such hubs E as are commonly used in burrs having blades soldered fast in the hubs, andthen just driving or otherwise tixin g, but not twisting or turning, a ring, 1:, tight on around the tapered shanks b in the hub; and burrs thus made can have their old or worn-out blades freely changed for new ones upon simply pressing or taking the'ring F ott' from around the shanks of the blades.

In the knitting-burrs shown in the drawings the blades A are secured in the obliquelyslo'tted hub E by a ring, F, just driven on tightly around the shanks b of the blades; but a part of. our invention consists in combining with the slotted hub E the series of blades A therein, the surrounding ring F, and a device whereby the said ring F can be pressed onto the shanks b of the blades, and also retained thereon with any desired or requisite force, but without any need of turning or twisting the ring, and be readily released on the shanks of the blades whenever the latter require to be changed.

shown'by Fig. 1, the ring F is pressed and retained on the shanks of the blades A in the hub E by means of a screw,- H, on. an extended part of the hub or socket of the burr, and a nut, I, arranged to workon the said screw H and bear against the ring F; but we contemplate using other known or equiv-' alent pressing and holdi'ng devices in place of the said screw and nut.

WVe are awarethat it is not new to secure; the blades oiknittingburrs in' slottedhubs by means of detachable parts, which, when re moved, leave the blades frcefto'be taken out 1 of the hub, knitting-burrs oflthat'description being shown inUnite'dStates Letters Pat- 'ent No. 35,565, dated JuneylO, 1862, wherein the removable blades w'ere hel'd stationary in an obliquely-slotted hub by means of two disks engaged with illld. clamped against the two opposite ends of the blades, so as to jpress the latter flatwi'se against the oblique the oblique hub-leaves j, between the blades.

Thus, in the burr What we claim as new and of our invenjections c thereon, and fastened in a slotted tion, and desire to secure by Letters Patent, hub, E, by a ring, F, on one side only of the 1. A knitting-burr blade, A, having a taburr, and surrounding the shanks and secured thereon by a tightening and holding device,

pered shank, b, provided with a projection, 0, 1-1-1, substantially as herein set forth.

sothat a series of the blades can be secured in a slotted hub, E, by means of a ring, F, on one side only of the burr, and surrounding the shanks, substantially as herein described.

2. A knitting-burr having a series of blades, A, provided with tapered shanks b and pro- GEORGE JACKSON. GEORGE CAMPBELL.

Witnesses:

P. v1). NI-VER, JOHN N. S. LANSING. 

